linux-kernel - Re: [PATCH 1/8] THP: Use real address for NUMA policy

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Message-ID: <520E672C.3080102@intel.com>
Date:	Fri, 16 Aug 2013 10:53:48 -0700
From:	Dave Hansen <dave.hansen@...el.com>
To:	Alex Thorlton <athorlton@....com>
CC:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Mel Gorman <mgorman@...e.de>,
	"Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
	Rik van Riel <riel@...hat.com>,
	Johannes Weiner <hannes@...xchg.org>,
	"Eric W . Biederman" <ebiederm@...ssion.com>,
	Sedat Dilek <sedat.dilek@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Dave Jones <davej@...hat.com>,
	Michael Kerrisk <mtk.manpages@...il.com>,
	"Paul E . McKenney" <paulmck@...ux.vnet.ibm.com>,
	David Howells <dhowells@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Al Viro <viro@...iv.linux.org.uk>,
	Oleg Nesterov <oleg@...hat.com>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	Kees Cook <keescook@...omium.org>, Robin Holt <holt@....com>
Subject: Re: [PATCH 1/8] THP: Use real address for NUMA policy

On 08/16/2013 07:33 AM, Alex Thorlton wrote:
> ---
>  mm/huge_memory.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/mm/huge_memory.c b/mm/huge_memory.c
> index a92012a..55ec681 100644

Could you add some actual descriptions to these patches that say why you
are doing this, and why this particular patch is needed and implemented
this way?

You mention that THP is slow for you, then go on to implement some
non-cached page zero'ing, but you never quite connect the dots.
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